An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Mauro Zammarano, Ickchan Kim, Isaac Leventon, Ankit Sharma
In 2023, a new standardized test method utilizing cone calorimetry was introduced as ASTM E3367. Commonly referred to as the Cube test, it is based on research conducted at the National Institute of Standards and Technology (NIST). The test measures the
Amy Mensch, Emma Veley, Sebastian Seda, Artur Chernovsky
Increased use of lithium-ion batteries in consumer products poses a risk for fires caused by these devices to occur in homes. To characterize the residential fire hazard from a common standing electric scooter, the 281 Wh lithium-ion battery pack was sent
Wai Cheong Tam, Md. Ismail Siddiqi Emon, Jian Chen, Hongqiang Fang, Jun Deng, Anthony Putorti
The paper presents the development of a multi-class classification model for the detection of early-stage thermal runaway events for button-top single-cell lithium-ion batteries. A signal gate mechanism is introduced to extract relevant acoustic data. A
Stanley Gilbert, Hongqiang Fang, David Butry, Wai Cheong Tam, Michelle Donnelly, Juan Fung
Lithium ion battery (LIB) fires are a growing problem that extends across the supply chain, including mining, production, warehousing, shipping, and waste disposal, as well as the consumer side. But data on such fires is fragmented and mostly incomplete
Jian Chen, Xue Liu, Haolan Chen, Qiuhong Wang, Jun Deng, Jingyu Zhou, Wai Cheong Tam, Yanni Zhang
This paper experimentally examined the thermal runaway (TR) characteristics and burning behavior of 18650 lithium-ion batteries (LIBs) with different inclination angles and states of charge (SOC). A series of experiments on TR burning of LIBs was conducted
The purpose of this chapter is to set out the principles of chemical kinetics as they apply to combustion in flames and fires. Chemical equilibrium, which was discussed in a previous chapter, deals with the final preferred state of a given set of reactants
Hongqiang Fang, Wai Cheong Tam, Ruggiero Lovreglio, Md. Ismail Siddiqi Emon, Michael Xuelin Huang
To enhance the safety of building fire evacuations by accounting for the dynamic and cumulative impacts of hazardous fire conditions on evacuees, we developed SafeStep, a novel reinforcement learning-based path planning model that integrates occupant
The laminar burning velocities of were measured for Trans-1,2-dichloroethylene (DCE), Perfluorobutylethylene (PFBE), a DCE/PFBE of 0.77/0.723 mass fractions , a DCE/PFBE blend of 0.60/0.40 mass fraction, 1,1-difluoroethane (HFC-152a), and C2H5F (vinyl
Accurate exhaust flow monitoring is critical to achieving accurate measurements of heat release rate during large fire experiments. Detailed characterizations of exhaust flow for a large fire research facility were conducted using procedures from standard
Erik Johnsson, Kathryn Butler, Marco Fernandez, Wei Tang, Shonali Nazare, Philip Deardorff, Sebastian Arana, Alexander Maranghides
NIST is studying how combustible landscape features around a home burn to better understand their levels of hazard and potential roles in spreading wildland-urban interface (WUI) fires. A series of field experiments was conducted to examine the effects of
Gregory Linteris, Michael Hegetschweiler, Valeri Babushok
Possible replacements for the refrigerant R-134a have been proposed in previous work based on their flammability behavior in standard tests of the Heating, Ventilation, Air-Conditioning, and Refrigeration industry. The present work extends that behavior to
Accurate flow measurements at the exhaust systems of large fire test facilities are critical for achieving accurate measurements of heat release rate. A detailed characterization of exhaust flow for the National Fire Research Laboratory (NFRL) has been
This report documents a series of fire experiments performed within steel electrical enclosures and on open "ladder back" cable trays. The first objective is to measure the heat release rates and qualitatively understand the burning behavior of circuit
Each year since 2014, the Department of Fire Protection Engineering at the University of Maryland has coordinated a Christmas Tree fire safety event to highlight the potential fire risk of dry Christmas Trees. Full-scale fire experiments at these events
Wai Cheong Tam, Jian Chen, Wei Tang, Qi Tong, Hongqiang Fang, Anthony Putorti
This paper presents the development of a fast-responding and accurate detection model for early-stage thermal runaway of a lithium-ion battery utilizing acoustics and a deep learning paradigm. A series of single-cell lithium-ion battery tests is conducted
Wai Cheong Tam, Fan Linhao, Qi Tong, Fang Hongqiang
This present work utilizes an interpretability model to understand and explain the decisions of deep learning models. The use of DeepLIFT is proposed and attributions of a study case are obtained. Benchmarking against two other interpretability models
A multi-input and multi-output (MIMO) machine learning model is developed to simultaneously detect firefighter's thermal risks across a commercial building structure. A total of 2000 numerical experiments with a wide range of fire and ventilation scenarios
Deep learning model has been a viable approach to forecast critical events in fire development. However, prior to its implementation in real-life firefighting, it is imperative to further understand the black box and assess its rationale. In this paper, an
Eric Link, Shonali Nazare, Karen Jackson, Lucy Fox, Alexander Maranghides
Two recreational vehicle (RV) travel trailers were burned outdoors at the Austin Fire Department training campus in Austin, TX. The goal of these preliminary experiments was to observe and document the burning behavior of fully furnished RV trailers and to
Surface coatings represent an important class of fire protective treatments. When deposited conformally, these treatments offer extremely effective fire protection, especially to high surface area substrates (e.g., textiles and foams). Additionally, use of
Isaac Leventon, Michael Heck, Kevin B. McGrattan, Matthew Bundy, Rick D. Davis
This report provides an overview of quantitative measurement data and visual observations obtained from a series of 52 full-scale fire growth experiments conducted on 16 unique combustible solids including: natural and synthetic polymers, copolymers
Jian Chen, Zhenghui Wang, Yanni Zhang, Yang Li, Wai Cheong Tam, Depeng Kong, Jun Deng
There are many potential hazards related with hot surface in industrial processes. Therefore, the ignition characteristics of liquid fuels on hot surfaces play an important role for fire safety engineering involved with energy utilization. In this study
Exhaust flow measurements are a significant source of uncertainty for measurements of heat release rate in large-scale fire experiments. Irregular flow distributions are often present in the exhaust ducts, making it difficult to measure flow accurately
Erik L. Johnsson, Kathryn Butler, Marco G. Fernandez, Shonali Nazare, Alexander Maranghides
A series of field experiments was conducted to examine the effects on fire spread toward a structure for firewood piles under conditions that may be encountered in a wildland-urban interface (WUI) fire. The fire behavior of a variety of firewood types in